Breeze or Freeze? The Essential HVAC Tools Every Smart Homeowner Needs to Know
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Which hand frame is used to apply thick duct mastic sealant to sheet metal seams?
Explanation
A standard caulking gun holds and squeezes silicone, fire-stop sealants, or water-based duct mastic sealant tubes. Properly sealing open seam gaps prevents treated air leakage inside drafty crawlspaces and crawl spaces, cutting energy bills.